git.sur5r.net Git - u-boot/blob - drivers/usb/host/ohci-sunxi.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Sunxi ohci glue
   4  *
   5  * Copyright (C) 2015 Hans de Goede <hdegoede@redhat.com>
   6  *
   7  * Based on code from
   8  * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
   9  */
  10
  11 #include <common.h>
  12 #include <asm/arch/clock.h>
  13 #include <asm/io.h>
  14 #include <dm.h>
  15 #include <usb.h>
  16 #include "ohci.h"
  17 #include <generic-phy.h>
  18
  19 #ifdef CONFIG_SUNXI_GEN_SUN4I
  20 #define AHB_CLK_DIST            2
  21 #else
  22 #define AHB_CLK_DIST            1
  23 #endif
  24
  25 #define SUN6I_AHB_RESET0_CFG_OFFSET 0x2c0
  26 #define SUN9I_AHB_RESET0_CFG_OFFSET 0x5a0
  27
  28 struct ohci_sunxi_cfg {
  29         bool has_reset;
  30         u32 extra_ahb_gate_mask;
  31         u32 extra_usb_gate_mask;
  32         u32 reset0_cfg_offset;
  33 };
  34
  35 struct ohci_sunxi_priv {
  36         ohci_t ohci;
  37         struct sunxi_ccm_reg *ccm;
  38         u32 *reset0_cfg;
  39         int ahb_gate_mask; /* Mask of ahb_gate0 clk gate bits for this hcd */
  40         int usb_gate_mask; /* Mask of usb_clk_cfg clk gate bits for this hcd */
  41         struct phy phy;
  42         const struct ohci_sunxi_cfg *cfg;
  43 };
  44
  45 static int ohci_usb_probe(struct udevice *dev)
  46 {
  47         struct usb_bus_priv *bus_priv = dev_get_uclass_priv(dev);
  48         struct ohci_sunxi_priv *priv = dev_get_priv(dev);
  49         struct ohci_regs *regs = (struct ohci_regs *)devfdt_get_addr(dev);
  50         int extra_ahb_gate_mask = 0;
  51         int phys, ret;
  52
  53         priv->cfg = (const struct ohci_sunxi_cfg *)dev_get_driver_data(dev);
  54         priv->ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  55         if (IS_ERR(priv->ccm))
  56                 return PTR_ERR(priv->ccm);
  57
  58         priv->reset0_cfg = (void *)priv->ccm +
  59                                    priv->cfg->reset0_cfg_offset;
  60
  61         phys = dev_count_phandle_with_args(dev, "phys", "#phy-cells");
  62         if (phys < 0) {
  63                 phys = 0;
  64                 goto no_phy;
  65         }
  66
  67         ret = generic_phy_get_by_name(dev, "usb", &priv->phy);
  68         if (ret) {
  69                 pr_err("failed to get %s usb PHY\n", dev->name);
  70                 return ret;
  71         }
  72
  73         ret = generic_phy_init(&priv->phy);
  74         if (ret) {
  75                 pr_err("failed to init %s USB PHY\n", dev->name);
  76                 return ret;
  77         }
  78
  79         ret = generic_phy_power_on(&priv->phy);
  80         if (ret) {
  81                 pr_err("failed to power on %s USB PHY\n", dev->name);
  82                 return ret;
  83         }
  84
  85 no_phy:
  86         bus_priv->companion = true;
  87
  88         /*
  89          * This should go away once we've moved to the driver model for
  90          * clocks resp. phys.
  91          */
  92         priv->ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_OHCI0;
  93         extra_ahb_gate_mask = priv->cfg->extra_ahb_gate_mask;
  94         priv->usb_gate_mask = CCM_USB_CTRL_OHCI0_CLK;
  95         priv->ahb_gate_mask <<= phys * AHB_CLK_DIST;
  96         extra_ahb_gate_mask <<= phys * AHB_CLK_DIST;
  97         priv->usb_gate_mask <<= phys;
  98
  99         setbits_le32(&priv->ccm->ahb_gate0,
 100                      priv->ahb_gate_mask | extra_ahb_gate_mask);
 101         setbits_le32(&priv->ccm->usb_clk_cfg,
 102                      priv->usb_gate_mask | priv->cfg->extra_usb_gate_mask);
 103         if (priv->cfg->has_reset)
 104                 setbits_le32(priv->reset0_cfg,
 105                              priv->ahb_gate_mask | extra_ahb_gate_mask);
 106
 107         return ohci_register(dev, regs);
 108 }
 109
 110 static int ohci_usb_remove(struct udevice *dev)
 111 {
 112         struct ohci_sunxi_priv *priv = dev_get_priv(dev);
 113         int ret;
 114
 115         if (generic_phy_valid(&priv->phy)) {
 116                 ret = generic_phy_exit(&priv->phy);
 117                 if (ret) {
 118                         pr_err("failed to exit %s USB PHY\n", dev->name);
 119                         return ret;
 120                 }
 121         }
 122
 123         ret = ohci_deregister(dev);
 124         if (ret)
 125                 return ret;
 126
 127         if (priv->cfg->has_reset)
 128                 clrbits_le32(priv->reset0_cfg, priv->ahb_gate_mask);
 129         clrbits_le32(&priv->ccm->usb_clk_cfg, priv->usb_gate_mask);
 130         clrbits_le32(&priv->ccm->ahb_gate0, priv->ahb_gate_mask);
 131
 132         return 0;
 133 }
 134
 135 static const struct ohci_sunxi_cfg sun4i_a10_cfg = {
 136         .has_reset = false,
 137 };
 138
 139 static const struct ohci_sunxi_cfg sun6i_a31_cfg = {
 140         .has_reset = true,
 141         .reset0_cfg_offset = SUN6I_AHB_RESET0_CFG_OFFSET,
 142 };
 143
 144 static const struct ohci_sunxi_cfg sun8i_h3_cfg = {
 145         .has_reset = true,
 146         .extra_ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_EHCI0,
 147         .reset0_cfg_offset = SUN6I_AHB_RESET0_CFG_OFFSET,
 148 };
 149
 150 static const struct ohci_sunxi_cfg sun9i_a80_cfg = {
 151         .has_reset = true,
 152         .reset0_cfg_offset = SUN9I_AHB_RESET0_CFG_OFFSET,
 153 };
 154
 155 static const struct ohci_sunxi_cfg sun50i_a64_cfg = {
 156         .has_reset = true,
 157         .extra_ahb_gate_mask = 1 << AHB_GATE_OFFSET_USB_EHCI0,
 158         .extra_usb_gate_mask = CCM_USB_CTRL_OHCI0_CLK,
 159         .reset0_cfg_offset = SUN6I_AHB_RESET0_CFG_OFFSET,
 160 };
 161
 162 static const struct udevice_id ohci_usb_ids[] = {
 163         {
 164                 .compatible = "allwinner,sun4i-a10-ohci",
 165                 .data = (ulong)&sun4i_a10_cfg,
 166         },
 167         {
 168                 .compatible = "allwinner,sun5i-a13-ohci",
 169                 .data = (ulong)&sun4i_a10_cfg,
 170         },
 171         {
 172                 .compatible = "allwinner,sun6i-a31-ohci",
 173                 .data = (ulong)&sun6i_a31_cfg,
 174         },
 175         {
 176                 .compatible = "allwinner,sun7i-a20-ohci",
 177                 .data = (ulong)&sun4i_a10_cfg,
 178         },
 179         {
 180                 .compatible = "allwinner,sun8i-a23-ohci",
 181                 .data = (ulong)&sun6i_a31_cfg,
 182         },
 183         {
 184                 .compatible = "allwinner,sun8i-a83t-ohci",
 185                 .data = (ulong)&sun6i_a31_cfg,
 186         },
 187         {
 188                 .compatible = "allwinner,sun8i-h3-ohci",
 189                 .data = (ulong)&sun8i_h3_cfg,
 190         },
 191         {
 192                 .compatible = "allwinner,sun9i-a80-ohci",
 193                 .data = (ulong)&sun9i_a80_cfg,
 194         },
 195         {
 196                 .compatible = "allwinner,sun50i-a64-ohci",
 197                 .data = (ulong)&sun50i_a64_cfg,
 198         },
 199         { /* sentinel */ }
 200 };
 201
 202 U_BOOT_DRIVER(usb_ohci) = {
 203         .name   = "ohci_sunxi",
 204         .id     = UCLASS_USB,
 205         .of_match = ohci_usb_ids,
 206         .probe = ohci_usb_probe,
 207         .remove = ohci_usb_remove,
 208         .ops    = &ohci_usb_ops,
 209         .platdata_auto_alloc_size = sizeof(struct usb_platdata),
 210         .priv_auto_alloc_size = sizeof(struct ohci_sunxi_priv),
 211         .flags  = DM_FLAG_ALLOC_PRIV_DMA,
 212 };